| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [prep] [adv] a | 249 |
|
| 2 | [prep] [adv] a hour | 222 |
|
| 3 | [vb past] [prep] a hour | 72 |
|
| 4 | [vb past] [adv] a hour | 60 |
|
